Pratama, Rizal Galih, and Johnsen Harta. “Development of Inorganic Molecular Shape Model Using 3D Printer to Strengthen Student’s Conceptual Understanding”. JTK (Jurnal Tadris Kimiya), vol. 6, no. 2, Dec. 2021, pp. 144-55, doi:10.15575/jtk.v6i2.12988.